Wazu Karne Ke Baad Ki Dua is a way to promise yourself the activity with good intentions. Dua After Wudu (ablution) keeps you reminded that you have agreed to do it in a good way. Reciting Wazu Karne Ke Baad Ki Dua keeps you close to Allah SWT, and you get endless blessings by reading these few words. You can read Dua After Wudu (ablution) in Arabic and its English and Urdu Translation here to know the meaning of Wazu Karne Ke Baad Ki Dua.
